Supplement reference
Glycine
A sourced reference on Glycine identity, evidence limits and safety context.
Source and review status
Published sources checked
Sources checked on: 6 September 2026
Qualified clinical review: Pending. This page has not been clinically reviewed.
About this source check
AI-assisted editorial source checking covers the cited material and its stated limits. It is not a systematic review, verification of a supplied product, or clinical sign-off.
Editorial role: InfoAddict. Last material change: 6 September 2026. Next source review: 6 March 2027.
Identity and product form
Glycine is an amino acid present in protein-containing foods and made by the body. A supplement is not a treatment for sleep, metabolic disease or psychiatric symptoms.
Sources: National Library of Medicine, PubMed
What the reviewed evidence can and cannot show
A study in partially sleep-restricted healthy volunteers reported subjective fatigue and sleepiness measures and a vigilance result after glycine. The specific short-term sleep-restriction setting does not establish treatment for insomnia or general recovery and metabolic claims.
Sources: National Library of Medicine, PubMed
Safety and limits
This study does not provide a personal sleep or treatment plan. This page gives no intake or combination instructions.
Sources: National Library of Medicine, PubMed
Published sources
- The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers.
National Library of Medicine, PubMed. 2012; accessed 6 September 2026.
Supports: Study in partially sleep-restricted healthy volunteers found subjective fatigue and vigilance changes; it does not establish insomnia treatment or broad recovery outcomes.
Change history
| Date | Change | Clinical-review status |
|---|---|---|
| 6 September 2026 | Source-linked reference published | Pending |
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